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WO2019096729A1 - Ensemble de pompage, en particulier servant à alimenter un ensemble d'étanchéité à bagues de glissement - Google Patents

Ensemble de pompage, en particulier servant à alimenter un ensemble d'étanchéité à bagues de glissement Download PDF

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Publication number
WO2019096729A1
WO2019096729A1 PCT/EP2018/080911 EP2018080911W WO2019096729A1 WO 2019096729 A1 WO2019096729 A1 WO 2019096729A1 EP 2018080911 W EP2018080911 W EP 2018080911W WO 2019096729 A1 WO2019096729 A1 WO 2019096729A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
axial
fluid
radial
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/080911
Other languages
German (de)
English (en)
Inventor
Markus Bareis
Christian Eisfeld
Martin Ertl
Christoph Karner
Hans-Georg Scherer
Berthold Schulten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EagleBurgmann Germany GmbH and Co KG
Original Assignee
EagleBurgmann Germany GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EagleBurgmann Germany GmbH and Co KG filed Critical EagleBurgmann Germany GmbH and Co KG
Priority to EP18803393.0A priority Critical patent/EP3710704B1/fr
Priority to CN201880072919.8A priority patent/CN111344491B/zh
Priority to CA3078996A priority patent/CA3078996C/fr
Priority to RU2020117194A priority patent/RU2743313C1/ru
Priority to PL18803393.0T priority patent/PL3710704T3/pl
Priority to US16/761,018 priority patent/US11585346B2/en
Publication of WO2019096729A1 publication Critical patent/WO2019096729A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/006—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps double suction pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D1/025—Comprising axial and radial stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/04—Helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/026—Details of the bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
    • F04D29/128—Shaft sealings using sealing-rings especially adapted for liquid pumps with special means for adducting cooling or sealing fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/186—Shaftless rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F04D3/02—Axial-flow pumps of screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3464—Mounting of the seal
    • F16J15/348—Pre-assembled seals, e.g. cartridge seals
    • F16J15/3484—Tandem seals

Definitions

  • the invention relates to a pump arrangement, in particular a mechanical seal arrangement for supplying the mechanical seal assembly with a fluid, which is guided to the sealing gap between the sliding rings of the mechanical seal. Furthermore, the present invention relates to a mechanical seal assembly with such a pump assembly. Mechanical seal assemblies are different from the prior art
  • a gaseous or liquid barrier medium is used, which is supplied into the sealing gap on the sliding surfaces between a rotating seal ring and a stationary seal ring.
  • a gaseous or liquid barrier medium is used, which is supplied into the sealing gap on the sliding surfaces between a rotating seal ring and a stationary seal ring.
  • basically any type of pump can be used to deliver the blocking medium, since usually only a small differential pressure between the pressure of the product to be sealed and the pressure of the blocking medium is present in order to prevent leakage through the sealing gap
  • the pump arrangement according to the invention of a mechanical seal arrangement for supplying a fluid to a mechanical seal has the advantage that a particularly compact construction of the pump arrangement is possible.
  • a plurality of pump stages can be integrated in the pump arrangement.
  • the pump assembly includes exactly one drive with a drive shaft, a first and a second axial pump and a radial pump.
  • the first and second axial pump convey the fluid in the axial direction of the drive shaft and the radial pump promotes the fluid in the radial direction of the drive shaft.
  • the first and second axial pump are arranged in the flow direction of the fluid through the pump assembly in front of the radial pump.
  • the single drive simultaneously drives both the first and second axial and radial pumps.
  • only a common drive for all three pumping stages is provided. In this way, a particularly simple and cost-effective design of a compact pumping arrangement can be provided.
  • the pump assembly comprises a magnetic coupling with a drive part having a first permanent magnet, a fixed hollow cylinder and a driven part with a second permanent magnet.
  • the hollow cylinder is arranged between the drive part and the output part and, for example, connected to a pump housing.
  • the drive part of the magnetic coupling is the drive shaft of the drive of the pump assembly.
  • first permanent magnets in the direction of a central axis of the drive shaft offset by a distance A to the second permanent magnet on the output member. This results in only a partial overlap between the first and second permanent magnets.
  • the first and second permanent magnets are preferably the same length in the axial direction.
  • the structure of the pump arrangement is such that the first axial pump promotes in a first axial direction and promotes the second axial pump in a second axial direction, which is opposite to the first axial direction.
  • the structure is preferably such that the opposing axial forces completely cancel each other out.
  • the structure of the first and second axial pump are identical. A particularly simple and compact construction results when the first and second axial pump and the radial pump are arranged directly on the output part of the magnetic coupling.
  • the first and second axial pump are a conveyor screw pump.
  • a conveying thread is arranged both on the rotating and on the stationary part.
  • a conveying thread is arranged only at one part, i.e., either the rotating part or the stationary part.
  • the conveyor screw pumps are the same length in the axial direction.
  • the pump arrangement preferably comprises a one-piece pump housing with an inlet and a drain.
  • the one-piece pump housing allows a configuration such that the first and second axial and the radial pump can be provided as a preassembled module and can be easily inserted into the one-piece pump housing.
  • an inlet direction to the inlet of the pump arrangement and an outlet direction in the outlet of the pump arrangement are preferably the same.
  • losses are minimized by deflecting the flow.
  • the pump assembly further comprises a fluid flow divider which divides a supplied fluid flow into two sub-streams.
  • a first substream leads to the first axial pump and a second substream leads to the second axial pump.
  • the fluid flow divider is preferably arranged immediately after the inlet in the pump housing.
  • the pump assembly further comprises a control unit configured to control a drive speed of the single drive to thereby control a delivery rate of the pump assembly.
  • the pump assembly comprises a first and a second radial bearing to support the output member to the hollow cylinder.
  • the fluid also serves as a lubricant for the first and second radial bearings.
  • a single thrust bearing is provided, particularly preferably adjacent to one of the radial bearings in order to realize an axial bearing of the driven part of the magnetic coupling. This is particularly possible when the first and second permanent magnets of the magnetic coupling are arranged offset in the axial direction to each other, so that by the arrangement of the permanent magnets an axial force is present only in one direction between the drive part and the output part.
  • the present invention relates to a mechanical seal assembly, comprising at least a first mechanical seal with a rotating and a stationary seal ring, which define a sealing gap between their sliding surfaces and a pump assembly according to the invention.
  • the mechanical seal assembly is preferably designed as a tandem construction comprising a first and a second mechanical seal in series. Fluid is supplied in the tandem construction in a space between the first and second mechanical seal.
  • Fig. 1 is a schematic view of a mechanical seal assembly with a
  • Fig. 2 is a sectional view showing the pump assembly of Fig. 1 in detail.
  • the mechanical seal assembly 1 comprises a first mechanical seal 2a and a second mechanical seal 2b to seal a product side 8 with a product to be sealed from an atmosphere side 9.
  • a T andem arrangement is shown in which seal the two mechanical seals 2a, 2b in the direction of a shaft center axis Y-Y in series on a common shaft 13.
  • a fluid circuit 7 which uses a fluid or a barrier medium, for example a liquid oil or the like.
  • the first and second mechanical seals 2a, 2b are of identical design in this embodiment and each comprise a rotating seal ring 3 and a stationary seal ring 4, which define a sealing gap 5 between their sliding surfaces.
  • the rotating seal rings 3 are fixed on the shaft 13 by means of a sleeve-shaped holding element 14.
  • the stationary seal rings 4 are fixed in a conventional manner in a seal housing 6.
  • the fluid circuit 7 comprises a suction line 70 and a pressure line 71.
  • a pump arrangement 10 is furthermore arranged in order to circulate the fluid in a closed circuit.
  • the pump assembly 10 includes a single drive 1 1, which is controlled by a control unit 12.
  • the fluid circuit 7 leads to a space 15 between the first mechanical seal 2a and the second mechanical seal 2b.
  • the fluid is in this case supplied to the vicinity of the sealing gaps 5 in order to ensure a seal at the sealing gaps 5.
  • a pressure of the fluid is slightly greater than a pressure of the product the product side 8.
  • a leakage of the product in the direction of the atmosphere side 9 is avoided.
  • the pump assembly 10 is shown in detail in FIG. As shown in Fig. 2, the pump assembly 10 includes a first axial pump 21, a second axial pump 22 and a radial pump 23.
  • the first and second axial pump 21, 22 are as
  • Conveyor thread pumps formed, wherein a delivery thread is provided both on the rotating part and on the stationary part of the two axial pumps 21, 22.
  • the first and second axial pumps 21, 22 are constructed the same, wherein a conveying direction of the first axial pump in a first axial direction X1 and the conveying direction of the second axial pump in an opposite axial direction X2.
  • the radial pump 23 is arranged between the first and second axial pumps 21, 22.
  • the radial pump 23 delivers the fluid in the radial direction R.
  • the pump arrangement 10 comprises a magnetic coupling 30.
  • the magnetic coupling 30 is arranged between the drive 11 and the two axial pumps 21, 22 and the radial pump 23.
  • the magnetic coupling serves to transmit a drive torque to the three pump stages of the pump assembly 10.
  • the magnetic coupling 30 includes a plurality of first permanent magnets 31 and a plurality of second permanent magnets 32. Between the permanent magnets 31, 32, a fixed hollow cylinder 33 is arranged. The hollow cylinder 33 is connected to a pump housing 38. The magnetic coupling 30 thus enables media separation between the fluid and the atmosphere.
  • the magnetic coupling 30 includes a driving part 30a and a driven part 30b.
  • the drive part 30a comprises a drive shaft 24 of the drive 11 and the first permanent magnets 31.
  • the output part 30b comprises the second permanent magnets 32 and a rotary sleeve 39.
  • the second permanent magnets 32 are arranged on the rotary sleeve 39.
  • two stationary sleeves 37 a, 37 b are arranged on the outer circumference of the rotary sleeve.
  • the axial pumps 21, 22 in the form of conveying threads between the stationary sleeves 37a, 37b and the rotary sleeve 39 are formed.
  • the radial pump 23 is arranged between the two stationary sleeves 37a, 37b.
  • the radial pump is shown in Fig. 2 only schematically and may include a plurality of wings or the like.
  • a feed 42 is also provided, wherein a feed direction in the inlet 42 is equal to a flow direction in the drain 41, namely radially.
  • the inlet 42 and the drain 41 are also on a common axis perpendicular to the axial direction XX.
  • a first radial bearing 34 and a second radial bearing 35 is provided for the storage of the rotary sleeve 39.
  • a radial bearing of the rotary sleeve 39 relative to the hollow cylinder 33.
  • grooves 34a and 35a provided on end sides of the two radial bearings 34 and 35 to supply fluid as a lubricant for the radial bearings to the bearing surfaces.
  • exactly one thrust bearing 36 is provided, which is arranged adjacent to the second radial bearing 35.
  • the thrust bearing 36 is arranged in a closure element 44, which closes the pump housing 38.
  • an arrangement of the first permanent magnets 31 is offset in the axial direction to an arrangement of the second permanent magnets 32.
  • the first permanent magnets 31 are offset by a distance A in the axial direction XX to the second permanent magnet 32.
  • the function of the pump assembly 10 is as follows.
  • the drive 11 is driven by the control unit 12, the drive shaft 24 rotates and thus also the first permanent magnets 31. Due to the magnetic forces acting on the second permanent magnets 32, the rotary sleeve 39 also begins to rotate.
  • the fluid flow B is divided into a first sub-flow B1 to the first axial flow pump 21 and a second sub-flow B2 to the second axial flow pump 22.
  • Das Fluid then flows, as indicated by the other arrows in Fig. 2, from the fluid flow divider 43 to the left and right and is reversed by 180 ° and then flows into the first and second axial pump 21, 22.
  • the radial pump 23 is then arranged, which performs a deflection of the fluid by 90 ° and a delivery into the drain 41.
  • the fluid is thus conveyed through the two axial pumps 21, 22 to the radial pump 23 arranged between the two axial pumps 21, 22.
  • the radial pump then leads to a deflection of the axially supplied fluid in the radial direction R and conveys the fluid via the outlet 41 into the pressure line 71 and thus in the direction of the mechanical seals 2a, 2b (see FIG.
  • three pump stages are integrated in a pump arrangement, wherein two Axialpump processn and a Radialpumptreatment are provided.
  • the two Axialpumpme here are opposite directions and preferably designed as a delivery thread. Due to the opposite arrangement of the first and second axial pump 21, 22, the axial forces occurring during the promotion can be canceled.
  • the offset in the axial direction XX arrangement of the first permanent magnets 31 relative to the second permanent magnet 32 ensures that a biasing force F is exerted continuously on the single thrust bearing 36. Due to the arrangement, this biasing force F is independent of a speed and independent of a viscosity of the fluid.
  • the pump assembly 10 according to the invention is very compact and robust and especially designed for high pressures up to 200 x 10 5 Pa. If the two axial pumps 21, 22 are designed as conveying threads and a closed circuit of the fluid is present, no further safety systems or sealing systems must be provided.
  • the first and second axial pumps designed as conveying threads as well as the radial pump ensure that a low friction occurs within the fluid during operation, so that only a small heat development results here.
  • Another great advantage of the pump arrangement 10 according to the invention is that a regulation of an amount of the pumped fluid depends only on the speed of the drive and can be easily realized by means of the control unit 12.
  • the pump housing 38 By the one-piece, in section U-shaped pump housing 38, the realization of an easy-to-install assembly is also possible.
  • the pump housing can also be provided in several parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un ensemble de pompage, en particulier un ensemble d'étanchéité à bague de glissement, servant à amener un fluide, en particulier à une garniture d'étanchéité à bague de glissement (2a, 2b). L'ensemble de pompage comprend précisément un entraînement (11) pourvu d'un arbre d'entraînement (24), une première pompe axiale (21), laquelle refoule le fluide dans la direction axiale (X-X) de l'arbre d'entraînement, une deuxième pompe axiale (22), laquelle refoule le fluide dans la direction axiale de l'arbre d'entraînement, et une pompe radiale (23), laquelle refoule le fluide dans la direction radiale (R) de l'arbre d'entraînement. La première pompe axiale (21) et la deuxième pompe axiale (22) sont disposées, dans une direction d'écoulement (B) du fluide à travers l'ensemble de pompage, devant la pompe radiale (23). L'entraînement (11) entraîne la première pompe axiale (21), la deuxième pompe axiale (22) et la pompe radiale (23).
PCT/EP2018/080911 2017-11-16 2018-11-12 Ensemble de pompage, en particulier servant à alimenter un ensemble d'étanchéité à bagues de glissement Ceased WO2019096729A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18803393.0A EP3710704B1 (fr) 2017-11-16 2018-11-12 Dispositif de pompage pour l'alimentation d'une garniture mécanique d'etanchéité
CN201880072919.8A CN111344491B (zh) 2017-11-16 2018-11-12 泵组件、特别地用于向机械密封组件供应的泵组件
CA3078996A CA3078996C (fr) 2017-11-16 2018-11-12 Pompe, en particulier pour l'alimentation d'un ensemble de joints mecaniques
RU2020117194A RU2743313C1 (ru) 2017-11-16 2018-11-12 Насосная система, в частности для снабжения системы контактного кольцевого уплотнения
PL18803393.0T PL3710704T3 (pl) 2017-11-16 2018-11-12 Zespół pompowy do zasilania zespołu uszczelnienia mechanicznego
US16/761,018 US11585346B2 (en) 2017-11-16 2018-11-12 Pump assembly, in particular for supplying a slide ring seal assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017220437.0 2017-11-16
DE102017220437.0A DE102017220437B8 (de) 2017-11-16 2017-11-16 Pumpenanordnung, insbesondere zur Versorgung einer Gleitringdichtungsanordnung

Publications (1)

Publication Number Publication Date
WO2019096729A1 true WO2019096729A1 (fr) 2019-05-23

Family

ID=64308750

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/080911 Ceased WO2019096729A1 (fr) 2017-11-16 2018-11-12 Ensemble de pompage, en particulier servant à alimenter un ensemble d'étanchéité à bagues de glissement

Country Status (8)

Country Link
US (1) US11585346B2 (fr)
EP (1) EP3710704B1 (fr)
CN (1) CN111344491B (fr)
CA (1) CA3078996C (fr)
DE (1) DE102017220437B8 (fr)
PL (1) PL3710704T3 (fr)
RU (1) RU2743313C1 (fr)
WO (1) WO2019096729A1 (fr)

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DE102022001479A1 (de) 2022-04-27 2023-11-02 KSB SE & Co. KGaA Kreiselpumpenanordnung
CN115451134B (zh) * 2022-09-19 2025-12-19 太原科技大学 一种提高密封耐压能力的磁性液体密封装置

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CA3078996A1 (fr) 2019-05-23
DE102017220437B3 (de) 2019-03-28
CA3078996C (fr) 2022-04-19
US20210025396A1 (en) 2021-01-28
EP3710704B1 (fr) 2023-05-31
PL3710704T3 (pl) 2023-09-18
EP3710704A1 (fr) 2020-09-23
RU2743313C1 (ru) 2021-02-17
CN111344491B (zh) 2021-11-16
US11585346B2 (en) 2023-02-21
CN111344491A (zh) 2020-06-26

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